mirror of https://gitee.com/openkylin/linux.git
drivers/oprofile: coding style fixes in buffer_sync.c
Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter
Ingo Molnar
parent
6657fe4f56
commit
73185e0a5d
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@ -33,7 +33,7 @@
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#include "event_buffer.h"
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#include "cpu_buffer.h"
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#include "buffer_sync.h"
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static LIST_HEAD(dying_tasks);
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static LIST_HEAD(dead_tasks);
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static cpumask_t marked_cpus = CPU_MASK_NONE;
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@ -48,10 +48,11 @@ static void process_task_mortuary(void);
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* Can be invoked from softirq via RCU callback due to
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* call_rcu() of the task struct, hence the _irqsave.
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*/
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static int task_free_notify(struct notifier_block * self, unsigned long val, void * data)
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static int
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task_free_notify(struct notifier_block *self, unsigned long val, void *data)
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{
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unsigned long flags;
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struct task_struct * task = data;
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struct task_struct *task = data;
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spin_lock_irqsave(&task_mortuary, flags);
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list_add(&task->tasks, &dying_tasks);
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spin_unlock_irqrestore(&task_mortuary, flags);
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@ -62,13 +63,14 @@ static int task_free_notify(struct notifier_block * self, unsigned long val, voi
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/* The task is on its way out. A sync of the buffer means we can catch
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* any remaining samples for this task.
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*/
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static int task_exit_notify(struct notifier_block * self, unsigned long val, void * data)
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static int
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task_exit_notify(struct notifier_block *self, unsigned long val, void *data)
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{
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/* To avoid latency problems, we only process the current CPU,
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* hoping that most samples for the task are on this CPU
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*/
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sync_buffer(raw_smp_processor_id());
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return 0;
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return 0;
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}
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@ -77,11 +79,12 @@ static int task_exit_notify(struct notifier_block * self, unsigned long val, voi
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* we don't lose any. This does not have to be exact, it's a QoI issue
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* only.
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*/
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static int munmap_notify(struct notifier_block * self, unsigned long val, void * data)
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static int
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munmap_notify(struct notifier_block *self, unsigned long val, void *data)
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{
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unsigned long addr = (unsigned long)data;
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struct mm_struct * mm = current->mm;
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struct vm_area_struct * mpnt;
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struct mm_struct *mm = current->mm;
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struct vm_area_struct *mpnt;
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down_read(&mm->mmap_sem);
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@ -99,11 +102,12 @@ static int munmap_notify(struct notifier_block * self, unsigned long val, void *
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return 0;
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}
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/* We need to be told about new modules so we don't attribute to a previously
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* loaded module, or drop the samples on the floor.
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*/
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static int module_load_notify(struct notifier_block * self, unsigned long val, void * data)
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static int
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module_load_notify(struct notifier_block *self, unsigned long val, void *data)
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{
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#ifdef CONFIG_MODULES
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if (val != MODULE_STATE_COMING)
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@ -118,7 +122,7 @@ static int module_load_notify(struct notifier_block * self, unsigned long val, v
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return 0;
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}
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static struct notifier_block task_free_nb = {
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.notifier_call = task_free_notify,
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};
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@ -135,7 +139,7 @@ static struct notifier_block module_load_nb = {
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.notifier_call = module_load_notify,
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};
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static void end_sync(void)
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{
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end_cpu_work();
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@ -208,14 +212,14 @@ static inline unsigned long fast_get_dcookie(struct path *path)
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* not strictly necessary but allows oprofile to associate
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* shared-library samples with particular applications
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*/
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static unsigned long get_exec_dcookie(struct mm_struct * mm)
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static unsigned long get_exec_dcookie(struct mm_struct *mm)
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{
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unsigned long cookie = NO_COOKIE;
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struct vm_area_struct * vma;
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struct vm_area_struct *vma;
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if (!mm)
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goto out;
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for (vma = mm->mmap; vma; vma = vma->vm_next) {
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if (!vma->vm_file)
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continue;
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@ -235,13 +239,14 @@ static unsigned long get_exec_dcookie(struct mm_struct * mm)
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* sure to do this lookup before a mm->mmap modification happens so
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* we don't lose track.
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*/
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static unsigned long lookup_dcookie(struct mm_struct * mm, unsigned long addr, off_t * offset)
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static unsigned long
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lookup_dcookie(struct mm_struct *mm, unsigned long addr, off_t *offset)
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{
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unsigned long cookie = NO_COOKIE;
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struct vm_area_struct * vma;
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struct vm_area_struct *vma;
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for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
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if (addr < vma->vm_start || addr >= vma->vm_end)
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continue;
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@ -265,7 +270,7 @@ static unsigned long lookup_dcookie(struct mm_struct * mm, unsigned long addr, o
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static unsigned long last_cookie = INVALID_COOKIE;
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static void add_cpu_switch(int i)
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{
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add_event_entry(ESCAPE_CODE);
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@ -278,16 +283,16 @@ static void add_kernel_ctx_switch(unsigned int in_kernel)
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{
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add_event_entry(ESCAPE_CODE);
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if (in_kernel)
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add_event_entry(KERNEL_ENTER_SWITCH_CODE);
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add_event_entry(KERNEL_ENTER_SWITCH_CODE);
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else
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add_event_entry(KERNEL_EXIT_SWITCH_CODE);
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add_event_entry(KERNEL_EXIT_SWITCH_CODE);
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}
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static void
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add_user_ctx_switch(struct task_struct const * task, unsigned long cookie)
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add_user_ctx_switch(struct task_struct const *task, unsigned long cookie)
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{
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add_event_entry(ESCAPE_CODE);
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add_event_entry(CTX_SWITCH_CODE);
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add_event_entry(CTX_SWITCH_CODE);
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add_event_entry(task->pid);
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add_event_entry(cookie);
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/* Another code for daemon back-compat */
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@ -296,7 +301,7 @@ add_user_ctx_switch(struct task_struct const * task, unsigned long cookie)
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add_event_entry(task->tgid);
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}
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static void add_cookie_switch(unsigned long cookie)
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{
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add_event_entry(ESCAPE_CODE);
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@ -304,7 +309,7 @@ static void add_cookie_switch(unsigned long cookie)
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add_event_entry(cookie);
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}
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static void add_trace_begin(void)
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{
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add_event_entry(ESCAPE_CODE);
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@ -319,13 +324,13 @@ static void add_sample_entry(unsigned long offset, unsigned long event)
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}
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static int add_us_sample(struct mm_struct * mm, struct op_sample * s)
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static int add_us_sample(struct mm_struct *mm, struct op_sample *s)
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{
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unsigned long cookie;
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off_t offset;
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cookie = lookup_dcookie(mm, s->eip, &offset);
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cookie = lookup_dcookie(mm, s->eip, &offset);
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if (cookie == INVALID_COOKIE) {
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atomic_inc(&oprofile_stats.sample_lost_no_mapping);
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return 0;
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@ -341,13 +346,13 @@ static int add_us_sample(struct mm_struct * mm, struct op_sample * s)
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return 1;
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}
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/* Add a sample to the global event buffer. If possible the
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* sample is converted into a persistent dentry/offset pair
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* for later lookup from userspace.
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*/
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static int
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add_sample(struct mm_struct * mm, struct op_sample * s, int in_kernel)
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add_sample(struct mm_struct *mm, struct op_sample *s, int in_kernel)
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{
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if (in_kernel) {
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add_sample_entry(s->eip, s->event);
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@ -359,9 +364,9 @@ add_sample(struct mm_struct * mm, struct op_sample * s, int in_kernel)
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}
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return 0;
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}
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static void release_mm(struct mm_struct * mm)
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static void release_mm(struct mm_struct *mm)
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{
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if (!mm)
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return;
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@ -370,9 +375,9 @@ static void release_mm(struct mm_struct * mm)
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}
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static struct mm_struct * take_tasks_mm(struct task_struct * task)
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static struct mm_struct *take_tasks_mm(struct task_struct *task)
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{
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struct mm_struct * mm = get_task_mm(task);
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struct mm_struct *mm = get_task_mm(task);
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if (mm)
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down_read(&mm->mmap_sem);
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return mm;
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@ -383,10 +388,10 @@ static inline int is_code(unsigned long val)
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{
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return val == ESCAPE_CODE;
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}
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/* "acquire" as many cpu buffer slots as we can */
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static unsigned long get_slots(struct oprofile_cpu_buffer * b)
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static unsigned long get_slots(struct oprofile_cpu_buffer *b)
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{
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unsigned long head = b->head_pos;
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unsigned long tail = b->tail_pos;
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@ -412,7 +417,7 @@ static unsigned long get_slots(struct oprofile_cpu_buffer * b)
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}
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static void increment_tail(struct oprofile_cpu_buffer * b)
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static void increment_tail(struct oprofile_cpu_buffer *b)
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{
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unsigned long new_tail = b->tail_pos + 1;
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@ -435,8 +440,8 @@ static void process_task_mortuary(void)
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{
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unsigned long flags;
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LIST_HEAD(local_dead_tasks);
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struct task_struct * task;
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struct task_struct * ttask;
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struct task_struct *task;
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struct task_struct *ttask;
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spin_lock_irqsave(&task_mortuary, flags);
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@ -493,7 +498,7 @@ void sync_buffer(int cpu)
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{
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struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
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struct mm_struct *mm = NULL;
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struct task_struct * new;
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struct task_struct *new;
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unsigned long cookie = 0;
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int in_kernel = 1;
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unsigned int i;
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@ -501,7 +506,7 @@ void sync_buffer(int cpu)
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unsigned long available;
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mutex_lock(&buffer_mutex);
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add_cpu_switch(cpu);
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/* Remember, only we can modify tail_pos */
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@ -509,8 +514,8 @@ void sync_buffer(int cpu)
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available = get_slots(cpu_buf);
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for (i = 0; i < available; ++i) {
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struct op_sample * s = &cpu_buf->buffer[cpu_buf->tail_pos];
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struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
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if (is_code(s->eip)) {
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if (s->event <= CPU_IS_KERNEL) {
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/* kernel/userspace switch */
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@ -522,7 +527,7 @@ void sync_buffer(int cpu)
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state = sb_bt_start;
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add_trace_begin();
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} else {
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struct mm_struct * oldmm = mm;
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struct mm_struct *oldmm = mm;
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/* userspace context switch */
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new = (struct task_struct *)s->event;
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@ -533,13 +538,11 @@ void sync_buffer(int cpu)
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cookie = get_exec_dcookie(mm);
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add_user_ctx_switch(new, cookie);
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}
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} else {
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if (state >= sb_bt_start &&
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!add_sample(mm, s, in_kernel)) {
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if (state == sb_bt_start) {
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state = sb_bt_ignore;
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atomic_inc(&oprofile_stats.bt_lost_no_mapping);
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}
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} else if (state >= sb_bt_start &&
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!add_sample(mm, s, in_kernel)) {
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if (state == sb_bt_start) {
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state = sb_bt_ignore;
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atomic_inc(&oprofile_stats.bt_lost_no_mapping);
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}
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}
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